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DISCLOSURE OF CHANGES IN NUMBER OF SHARES - shares | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Treasury stock | (4,377,458) | (2,169,178) |
Common Stock - Outstanding | 99,942,845 | 102,068,981 |
Common Stock |  |  |
Beginning balance | 104,238,159 | 104,058,684 | 103,816,185
Issuance of stock | 82,144 | 179,475 | 242,499
Balance at end of year | 104,320,303 | 104,238,159 | 104,058,684
Treasury stock | (4,377,458) | (2,169,178) | (267,752)
Common Stock - Outstanding | 99,942,845 | 102,068,981 | 103,790,932
Preferred Stock |  |  |
Beginning balance | 2,006,391 | 2,006,391 | 2,006,391
Balance at end of year | 2,006,391 | 2,006,391 | 2,006,391

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